add auto-refresh to dashboard + fix bug

selected "tab"/"button" is now properly highlighted
dashboard refreshes every 30 seconds

tlapbot/static/dashboard.js

@@ -15,5 +15,9 @@ function openTab(event, tabName) {
   
     // Show the current tab, and add an "active" class to the button that opened the tab
     document.getElementById(tabName).style.display = "block";
-    evt.currentTarget.className += " active";
+    event.currentTarget.className += " active";
   }
+
+function refreshPage() {
+    window.location.reload();
+}

tlapbot/templates/dashboard.html

@@ -110,10 +110,11 @@
         </body>
     </div>
 
+    <script>
+        document.getElementById("defaultOpen").click();
+        setTimeout(refreshPage, 30 * 1000);
+    </script>
+
 </div>
 
-<script>
-    document.getElementById("defaultOpen").click();
-</script>
-
 </html>